Description
Molub-Alloy 880 Medium SF is a non-solvent containing lubricant developed
specifically for use on Monighan Walking Cam mechanisms of large surface
mining equipment. Unlike the conventional asphaltic base lubricants, MolubAlloy 880 Medium SF exhibits exceptional plasticity and adherence to bearing
surfaces over a wide temperature range because of its unique combination of
oils and adhesive and tackiness agents.
During a relocation (walk), the Monighan cam bearing surfaces are in combined
sliding and rolling motion in line contact only. The pressure actually exceeds the
yield strength of the metal at contacting asperities (microscopic high spots)
creating the potential for high temperature and metal welding. A high content of
a proprietary blend of Molub-Alloy solid lubricants not only serves to strengthen
the film structure, but also helps to reduce contact temperatures and metal
welding.
Maximized extreme pressure (EP) characteristics are achieved without the use of
lead compounds considered to be undesirable by environmental agencies. The
combined action of the film-forming antiweld components of Molub-Alloy 880
Medium SF help to eliminate "chatter" and vibration during walks as well as
reducing friction, wear and the resultant high costs of repairs and downtime.
Molub-Alloy 880 SF Medium is part of Tribol's Eco-SolutionsTM product
offering. Formulated to address environmental concerns, Molub-Alloy 880
SF Medium is free of lead, antimony, barium, zinc, and chlorinated solvents.
No solvents of any kind are used in Molub-Alloy 880 Medium SF.
Molub-Alloy 880 Medium SF is manufactured from a select, high viscosity
petroleum oil together with other, non-asphaltic, petroleum constituents. These
are further fortified with adhesive and tackiness agents plus an inorganic
thickener chosen for its flow and film-forming characteristics.
"Non-weld" extreme pressure characteristics are provided by a proprietary blend
of Molub-Alloy lubricating solids of select grade and size distribution working
synergistically with chemical EP additives.
The unique formulation of Molub-Alloy 880 Medium SF accounts for the
building, under extreme sliding rolling pressures, of a tough, nearly impenetrable
lubricating film which resists "melting" or "squeezing" out as well as wiping or
washing off through a broad range of climatic conditions.
Applications
The primary application which Molub-Alloy 880 Medium SF is intended for is
the lubrication of the Monighan Walking Cam mechanism. It does, however,
serve to lubricate other bearing surfaces in slow relative motion where pressures
are sufficiently high to cause metal deformation at asperities with possible
seizing and galling.
Typical examples would be heavy sliding mechanisms or large open gears
exposed to heavy or shock loading and possibly high ambient temperatures.
Heavy-duty pressure dispensing equipment is required for use in the automatic
application of Molub-Alloy 880 Medium SF.
Advantages
Compounded for the protection of the ecology and the elimination of hazardous
materials.
Minimization of "chatter" (vibration) during a walk.
Safe, accurate and economical application when using automatic pressure
dispensing systems.
Maximized extreme pressure (EP) characteristics without the use of lead
compounds.
Minimum product consumption, reduction of waste and housekeeping problems
with formation of highly durable lubricant film.
Reduction of maintenance, costly repairs and lost production.
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